1. BY: BRIAN COURTRIGHT, JASMINE JACOB, KATHLEEN PRILUTSKI, AND GABRIEL ROSENWALD STUDY PERFORMANCE OF AA CELLS

2. Disposable cameras use AA batteries to power the flash and other functions. We studied the endurance of these batteries by completing a lab in which we hooked up a battery to a multimeter and a breadboard connected to four parallel resistors. A voltage was recorded every five minutes for thirty-five minutes. In this lab it was found that a AA battery can be reused up to nine times using twenty-seven flashes. We found this by calculating the capacity by multiplying the average discharge current value by the time required to reach terminal voltage. We then compared this to the capacity of just one flash cycle. Recycling the battery nine times certainly cuts down cost of these cameras and definitely helps in reducing waste.

3. DATA OF AA CELLS AA cell used: Alkaline Resistors used (Ω): 4 Initial Voltage (V) without load: 1.63 V Final Voltage (V) without load: 1.278V Measured Resistance Ω (of resistive load): 1.1 Ω

4. DATA COLLECTED FROM AA CELL Time (min)Voltage (V)Current (A)Power (W) 01.080.9811.06036 50.9840.89450.8802327 100.9300.8450.78627 150.9050.82270.7445681 200.8850.80450.7120227 250.8620.78360.6754945 300.8280.75270.6232581 350.8090.73540.594827

5. CAPACITY OF TESTED AA CELL Determine the estimated capacity of tested AA cell by multiplying the average current through resistive load and time taken to achieve the terminal voltage. Express your results in Ampere-Hour. 0.82745 Ampere*(35min/60 min)*1hour= 0.4826645833 Ampere-Hour This results in 268.1469907charges per one flash. By using the knowledge that it takes 0.0018 Ampere*Hour during one flash charge cycle.